<head>
    <!-- ... -->
    <link rel="stylesheet" href="@fullcalendar/core/main.css">
    <link rel="stylesheet" href="@fullcalendar/daygrid/main.css">
    <link rel="stylesheet" href="@fullcalendar/timegrid/main.css">
    <link rel="stylesheet" href="@fullcalendar/list/main.css">
    <!-- ... -->
</head>
